- Training data: 75k manually word-segmented training sentences from the VLSP 2013 word segmentation shared task.
- Test data: 2120 test sentences from the VLSP 2013 POS tagging shared task.
| Model | F1 | Paper | Code |
|---|---|---|---|
| VnCoreNLP-RDRsegmenter (2018) | 97.90 | A Fast and Accurate Vietnamese Word Segmenter | Official |
| UETsegmenter (2016) | 97.87 | A hybrid approach to Vietnamese word segmentation | Official |
| vnTokenizer (2008) | 97.33 | A Hybrid Approach to Word Segmentation of Vietnamese Texts | |
| JVnSegmenter (2006) | 97.06 | Vietnamese Word Segmentation with CRFs and SVMs: An Investigation | |
| DongDu (2012) | 96.90 | Ứng dụng phương pháp Pointwise vào bài toán tách từ cho tiếng Việt |
- Results for VnTokenizer, JVnSegmenter and DongDu are reported in "A hybrid approach to Vietnamese word segmentation."
- 27,870 sentences for training and development from the VLSP 2013 POS tagging shared task:
- 27k sentences are used for training.
- 870 sentences are used for development.
- Test data: 2120 test sentences from the VLSP 2013 POS tagging shared task.
| Model | Accuracy | Paper | Code |
|---|---|---|---|
| VnCoreNLP-VnMarMoT (2017) | 95.88 | From Word Segmentation to POS Tagging for Vietnamese | Official |
| BiLSTM-CRF + CNN-char (2016) | 95.40 | End-to-end Sequence Labeling via Bi-directional LSTM-CNNs-CRF | Official / Link |
| BiLSTM-CRF + LSTM-char (2016) | 95.31 | Neural Architectures for Named Entity Recognition | Link |
| BiLSTM-CRF (2015) | 95.06 | Bidirectional LSTM-CRF Models for Sequence Tagging | Link |
| RDRPOSTagger (2014) | 95.11 | RDRPOSTagger: A Ripple Down Rules-based Part-Of-Speech Tagger | Official |
- Results for BiLSTM-CRF-based models and RDRPOSTagger are reported in "From Word Segmentation to POS Tagging for Vietnamese."
- 16,861 sentences for training and development from the VLSP 2016 NER shared task:
- 14,861 sentences are used for training.
- 2k sentences are used for development.
- Test data: 2,831 test sentences from the VLSP 2016 NER shared task.
- NOTE that in the VLSP 2016 NER data, each word representing a full personal name are separated into syllables that constitute the word. The VLSP 2016 NER data also consists of gold POS and chunking tags as reconfirmed by VLSP 2016 organizers. This scheme results in an unrealistic scenario for a pipeline evaluation:
- The standard annotation for Vietnamese word segmentation and POS tagging forms each full name as a word token, thus all word segmenters have been trained to output a full name as a word and all POS taggers have been trained to assign a POS label to the entire full-name.
- Gold POS and chunking tags are NOT available in a real-world application.
- For a realistic scenario, contiguous syllables constituting a full name are merged to form a word. Then, POS tags are predicted by using VnCoreNLP-VnMarMoT.
| Model | F1 | Paper | Code |
|---|---|---|---|
| VnCoreNLP (2018) | 88.55 | VnCoreNLP: A Vietnamese Natural Language Processing Toolkit | Official |
| BiLSTM-CRF + CNN-char (2016) | 88.28 | End-to-end Sequence Labeling via Bi-directional LSTM-CNNs-CRF | Official / Link |
| BiLSTM-CRF + LSTM-char (2016) | 87.71 | Neural Architectures for Named Entity Recognition | Link |
| BiLSTM-CRF (2015) | 86.48 | Bidirectional LSTM-CRF Models for Sequence Tagging | Link |
- BiLSTM-CRF-based scores are reported in "VnCoreNLP: A Vietnamese Natural Language Processing Toolkit."
- The last 1020 sentences of the benchmark Vietnamese dependency treebank VnDT are used for test, while the remaining 9k+ sentences are used for training & development. LAS and UAS scores are computed on all tokens (i.e. including punctuation).
| Model | LAS | UAS | Paper | Code | |
|---|---|---|---|---|---|
| Predicted POS | VnCoreNLP (2018) | 70.23 | 76.93 | VnCoreNLP: A Vietnamese Natural Language Processing Toolkit | Official |
| Gold POS | VnCoreNLP (2018) | 73.39 | 79.02 | VnCoreNLP: A Vietnamese Natural Language Processing Toolkit | Official |
| Gold POS | BiLSTM graph-based parser (2016) | 73.17 | 79.39 | Simple and Accurate Dependency Parsing Using Bidirectional LSTM Feature Representations | Official |
| Gold POS | BiLSTM transition-based parser (2016) | 72.53 | 79.33 | Simple and Accurate Dependency Parsing Using Bidirectional LSTM Feature Representations | Official |
| Gold POS | MSTparser (2006) | 70.29 | 76.47 | Online large-margin training of dependency parsers | |
| Gold POS | MaltParser (2007) | 69.10 | 74.91 | MaltParser: A language-independent system for datadriven dependency parsing |
- Predicted POS tags are generated by using VnCoreNLP-VnMarMoT. Results for the BiLSTM graph/transition-based parsers, MSTparser and MaltParser are reported in "An empirical study for Vietnamese dependency parsing."